8th Grade Motion and Forces

What is the best definition for motion?

• change in position relative to a reference point

• speeding up and slowing down

• a force

• none of the above

Which of the following are SI units?

• meter

• feet

• mile

• second

Which is the correct formula for speed

• velocity $\div$ time

• distance $\div$ time

• velocity $\times$ time

• distance $\times$ time

When calculating velocity, what else do you have to consider besides speed?

• weight

• mass

• acceleration

• direction

What is the slope from stop 5 to stop 6?

• 10

• 20

• 5

• 6

What was the average speed?

• 4km

• 4km/h

• 10km/min

• .1km/min

What is the speed at point B?

• 1 m/s

• 2 m/s

• 0 m/s

• 10 m/s

At which point was the object moving the fastest?

• A

• B

• C

• D

Acceleration includes

• speeding up

• slowing down

• changing direction

• changing your mind

A car is moving at 15m/s. Ten seconds later it is moving at 35m/s. What was its acceleration?

• 20m/s

• 20m/s²

• 2m/s

• 2m/s²